Roper Washer Error Code Sud LOC: Over Suds Detection... | appliancefaults.com

Technical Background:

The washer's Main Control Unit (MCU) monitors the water level via the pressure switch and detects excessive suds based on this input and motor load. If the suds level is too high, the MCU activates the Sud LOC error to prevent damage to the washer and potential flooding. The MCU sends a low voltage signal (typically 5V DC) to the pressure switch, and the returned voltage varies based on pressure. Deviations outside the expected range trigger the error.

Symptoms:

The Roper washer displays a "Sud LOC" error code and may stop mid-cycle. You may observe excessive suds in the wash drum.

Possible Causes:

Excessive detergent use.
Incorrect type of detergent (non-HE).
Drain pump malfunction preventing proper water removal.
Pressure switch malfunction falsely indicating high water level.
Clogged drain line or standpipe restricting water flow.
Faulty water level sensor.

Solution:

1

Disconnect power to the washer at the breaker panel.
2

Inspect the drain hose for kinks or clogs. Remove and flush with water.
3

Check the drain pump for obstructions. Remove any debris.
4

Verify the pressure switch hose is properly connected and free from kinks or clogs. Use a multimeter to test the pressure switch continuity; it should change state when you gently blow into the hose.
5

Check the standpipe height; it should be at least 30 inches tall.
6

Run a clean washer cycle with no detergent to flush out excess suds.
7

If the problem persists, replace the pressure switch or drain pump.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Use Lock-Out/Tag-Out (LOTO) procedures. Be aware of potential electrical shock hazards; the washer operates on 120V AC.

Prevention:

Always use HE (High Efficiency) detergent. Measure detergent carefully, using only the recommended amount. Periodically run a washer cleaning cycle with a washing machine cleaner.

Expert Tip:

Some Roper washers have a service mode. Consult the tech sheet (usually located behind the lower access panel) for instructions on entering service mode to run diagnostic tests on the pressure switch and drain pump.

Frequently Asked Questions

•How do I access the drain pump on this Roper washer model?

Typically, you need to remove the lower front access panel. You may need a 1/4-inch nut driver or a flathead screwdriver. The drain pump is usually located at the bottom right or left corner of the washer. Disconnect the hoses and electrical connector before removing the pump.

•What is the correct type of HE detergent to use?

HE detergents are specifically formulated for high-efficiency washers. Look for detergents labeled "HE" on the bottle. These detergents produce fewer suds than regular detergents, which helps prevent problems like the Sud LOC error.

•How do I test the pressure switch with a multimeter?

Disconnect the pressure switch from the washer. Set your multimeter to the continuity setting. Attach the multimeter leads to the appropriate terminals on the switch (refer to the wiring diagram on the tech sheet). Gently blow into the hose connection on the switch. The multimeter should indicate a change in continuity when you blow into the hose, indicating the switch is functioning correctly.

Roper Washer Error Code Sud LOC: Over Suds Detection Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•How do I access the drain pump on this Roper washer model?

•What is the correct type of HE detergent to use?

•How do I test the pressure switch with a multimeter?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: